tf.math.reduce_variance | TensorFlow v2.0.0 (original) (raw)
tf.math.reduce_variance
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Computes the variance of elements across dimensions of a tensor.
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tf.compat.v1.math.reduce_variance
tf.math.reduce_variance(
input_tensor, axis=None, keepdims=False, name=None
)
Reduces input_tensor along the dimensions given in axis. Unless keepdims is true, the rank of the tensor is reduced by 1 for each entry in axis. If keepdims is true, the reduced dimensions are retained with length 1.
If axis is None, all dimensions are reduced, and a tensor with a single element is returned.
For example:
x = tf.constant([[1., 2.], [3., 4.]])
tf.reduce_variance(x) # 1.25
tf.reduce_variance(x, 0) # [1., 1.]
tf.reduce_variance(x, 1) # [0.25, 0.25]
| Args | |
|---|---|
| input_tensor | The tensor to reduce. Should have numeric type. |
| axis | The dimensions to reduce. If None (the default), reduces all dimensions. Must be in the range [-rank(input_tensor), rank(input_tensor)). |
| keepdims | If true, retains reduced dimensions with length 1. |
| name | A name scope for the associated operations (optional). |
| Returns |
|---|
| The reduced tensor, of the same dtype as the input_tensor. |
Numpy Compatibility
Equivalent to np.var
Please note that np.var has a dtype parameter that could be used to specify the output type. By default this is dtype=float64. On the other hand, tf.reduce_variance has an aggressive type inference frominput_tensor,